Toyota is one of the most outspoken proponents of hydrogen fuel cell vehicles, even ditching its partnership with Tesla Motors to focus on the Toyota Mirai hydrogen fuel-cell vehicle. But even with generous incentives, fueling hydrogen fuel cell vehicles won’t be cheap, with a full tank of the clean-burning fuel costing around $50, reports Ecomento.

That’s what Toyota’s Senior VP of North America Bob Carter said at the recent JP Morgan Auto Conference, claiming that cost estimate comes directly from the Department of Energy. He says the cost will eventually fall to about $30, which is about on par with the cost to fuel many high-mileage compact cars. For example, my 2012 Chevy Sonic 1.4T costs on average about $35 to fill, and gives me 300 miles of driving range, which is what the Toyota Mirai is claiming.

From the onset though, hydrogen fuel will remain nearly twice as expensive as gasoline it seems, though the Department of Energy is funding research to accelerate price parity with gasoline. But from the onset, filling up a hydrogen fuel cell car is going to be costly, moreso than even gasoline.